Arid
DOI10.1890/13-1083.1
The landscape of fear: the missing link to understand top-down and bottom-up controls of prey abundance?
Laundre, John W.1,2,3; Hernandez, Lucina1,2,3; Lopez Medina, Perla4; Campanella, Andrea5; Lopez-Portillo, Jorge1; Gonzalez-Romero, Alberto1; Grajales-Tam, Karina M.1; Burke, Anna M.; Gronemeyer, Peg2; Browning, Dawn M.6
通讯作者Laundre, John W.
来源期刊ECOLOGY
ISSN0012-9658
EISSN1939-9170
出版年2014
卷号95期号:5页码:1141-1152
英文摘要

Identifying factors that may be responsible for regulating the size of animal populations is a cornerstone in understanding population ecology. The main factors that are thought to influence population size are either resources (bottom-up), or predation (top-down), or interspecific competition (parallel). However, there are highly variable and often contradictory results regarding their relative strengths and influence. These varied results are often interpreted as indicating shifting control among the three main factors, or a complex, nonlinear relationship among environmental variables, resource availability, predation, and competition. We argue here that there is a missing link in our understanding of predator-prey dynamics. We explore whether the landscape-of-fear model can help us clarify the inconsistencies and increase our understanding of the roles, extent, and possible interactions of top-down, bottom-up, and parallel factors on prey population abundance. We propose two main predictions derived from the landscape-of-fear model: (1) for a single species, we suggest that as the makeup of the landscape of fear changes from relatively safe to relatively risky, bottom-up impacts switch from strong to weak as top-down impacts go from weak to strong; (2) for two or more species, interspecific competitive interactions produce various combinations of bottom-up, top-down, and parallel impacts depending on the dominant competing species and whether the landscapes of fear are shared or distinctive among competing species. We contend that these predictions could successfully explain many of the complex and contradictory results of current research. We test some of these predictions based on long-term data for small mammals from the Chihuahuan Desert in the United States. and Mexico. We conclude that the landscape-of-fear model does provide reasonable explanations for many of the reported studies and should be tested further to better understand the effects of bottom-up, top-down, and parallel factors on population dynamics.


英文关键词bottom-up control Chihuahuan Desert United States and Mexico fox abundance Jornada Experimental Range New Mexico USA landscape of fear Mapimi Biosphere Reserve Durango Mexico Merriami kangaroo rat Dipodomys merriami parallel control effects population density predation risk species conservation and management top-down control
类型Article
语种英语
国家Mexico ; USA
收录类别SCI-E
WOS记录号WOS:000336740500004
WOS关键词DESERT RODENT COMMUNITY ; PREDATION RISK ; PATCH USE ; CHIHUAHUAN DESERT ; LONG-TERM ; ABIOTIC FACTORS ; TEMPORAL DYNAMICS ; FORAGING GAMES ; SNOWSHOE HARES ; OWL PREDATION
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
来源机构New Mexico State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/181708
作者单位1.Inst Ecol, AC, Xalapa 91070, Veracruz, Mexico;
2.New Mexico State Univ, Las Cruces, NM 88003 USA;
3.SUNY Coll Oswego, Oswego, NY 13126 USA;
4.Univ Autonoma Queretaro, Queretaro 76010, Qro, Mexico;
5.New Mexico State Univ, Jornada Basin LTER USDA ARS, Las Cruces, NM 88003 USA;
6.USDA ARS Jornada Expt Range, Las Cruces, NM 88003 USA
推荐引用方式
GB/T 7714
Laundre, John W.,Hernandez, Lucina,Lopez Medina, Perla,et al. The landscape of fear: the missing link to understand top-down and bottom-up controls of prey abundance?[J]. New Mexico State University,2014,95(5):1141-1152.
APA Laundre, John W..,Hernandez, Lucina.,Lopez Medina, Perla.,Campanella, Andrea.,Lopez-Portillo, Jorge.,...&Browning, Dawn M..(2014).The landscape of fear: the missing link to understand top-down and bottom-up controls of prey abundance?.ECOLOGY,95(5),1141-1152.
MLA Laundre, John W.,et al."The landscape of fear: the missing link to understand top-down and bottom-up controls of prey abundance?".ECOLOGY 95.5(2014):1141-1152.
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